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Quick change structure for multi-functional saws and quick change method

a multi-functional, quick change technology, applied in the direction of metal sawing tools, metal sawing apparatus, metal-working equipment, etc., can solve the problems of complex fastening and dismantling operations, potential safety hazards, failure of fastening, etc., to improve the operation feeling of products, quick change of saw blades, and expansion of the application scope of products

Active Publication Date: 2021-12-28
ZHEJIANG JINMEI TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables simple and fast saw blade dismantling and changing without auxiliary tools, enhancing safety and reducing mechanical failures by securely locking the saw blade using an eccentric mechanism and spring forces.

Problems solved by technology

Without a locking safety structure, the saw blade of the multi-functional saw with such structure and replacement manner tends to become loose during rotation, bringing potential hazards to safety use.
Besides, the fastening and dismantling operations are complicated.
Sometimes, fastening fails, and sometimes, dismantling fails.
The hexagon wrench is required to be portable, and has the defect of tending to be lost.
However, an ejection spring and a reset spring need to work together to execute the quick exchange operation, and the operation tends to go wrong after long-term use, bringing certain inconvenience to users.

Method used

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  • Quick change structure for multi-functional saws and quick change method
  • Quick change structure for multi-functional saws and quick change method
  • Quick change structure for multi-functional saws and quick change method

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Embodiment Construction

[0037]In order to help people further understand the contents of the present invention, the present invention is described in detail in conjunction with the attached drawings and embodiments. The following embodiments apply to the present invention, but cannot be regarded as limiting the scope of the present invention.

[0038]As shown in FIG. 1, in this embodiment, a quick change structure for multi-functional saws includes a quick change handle 1, an eccentric block 2, a snap spring 3, a first cylindrical pin 4, a head housing 5, a deep groove ball bearing 6, a snap spring 7, a shift fork 8, a needle bearing 9, a sealing ring 10, an output shaft 11, a movable rod 12, a small cylindrical compression spring 13, a plastic support block 14, a movable bracket 15, a second cylindrical pin 16, a cylindrical compression spring 17, a third cylindrical pin 18, a plastic fixed seat 19, a locking pin 20, a positioning ring 21 and a saw blade 22. The top of the head housing 5 is connected with th...

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PUM

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Abstract

The present invention relates to a quick change structure for multi-functional saws and a quick change method. The quick change structure has a head housing, an output shaft and a quick change device. On the quick change device, a quick change handle can be pulled to drive an eccentric block, a movable rod, a small cylindrical compression spring and a movable bracket in turn such that the second cylindrical pin at the lower part of the movable bracket moves downward in the guide slot of each one of locking pins, driving the locking pins to rotate around a third cylindrical pin to fold together. After a saw blade is placed, the locking pins will unfold when an upward force is applied, and then the locking pins lock the saw blade to realize quick change of the saw blade.

Description

[0001]This is a U.S. national stage application of PCT Application No. PCT / CN2018 / 082201 under 35 U.S.C. 371, filed Apr. 8, 2018 in Chinese, claiming priority of Chinese Application No. 201710671524.7, filed Aug. 8, 2017, all of which are hereby incorporated by reference.BACKGROUND OF THE INVENTIONTechnical Field[0002]The present invention belongs to the technical field of mechanical equipment and relates to a detachable structure for quick separation or assembling of a tool bit and a machine body of a replaceable tool bit type electrical tool, in particular to a quick change structure for multi-functional saws. The present invention also discloses a quick change method of the quick change structure for multi-functional saws.Description of Related Art[0003]The majority of multi-functional saws on the market employ a pressure plate and inner hexagon screws. The saw blade of a multi-functional saw is usually fastened or unfastened using a special tool or by manually rotating a fasteni...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B23D61/00
CPCB23D61/00B25F5/00B23D61/006B27B5/32
Inventor GAO, JINYUNFENG, ZHIMING
Owner ZHEJIANG JINMEI TOOLS
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